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Repair Design for Concrete Structures Damaged by Chloride Corrosion of Reinforcement

Research Project

Project/Area Number 62550348
Research Category

Grant-in-Aid for General Scientific Research (C)

Allocation TypeSingle-year Grants
Research Field コンクリート工学・土木材料・施工
Research InstitutionKyoto University

Principal Investigator

MIYAGAWA Toyoaki  Instructor, Dept. of Civil Eng., Faculty of Eng., Kyoto University, 工学部, 助手 (80093318)

Project Period (FY) 1987 – 1988
Project Status Completed (Fiscal Year 1988)
Budget Amount *help
¥2,000,000 (Direct Cost: ¥2,000,000)
Fiscal Year 1988: ¥700,000 (Direct Cost: ¥700,000)
Fiscal Year 1987: ¥1,300,000 (Direct Cost: ¥1,300,000)
KeywordsRepair Design / Durability Design / Surface Treatment / Reinforced Concrete / Diffusion of Oxygen / Diffusion of Water / Diffusion of Chloride Ion / 塩化物腐食 / 塩害 / コンクリート構造物 / ひびわれ追従性 / 補修 / ライニング / 物質透過性
Research Abstract

Permeability performance of surface treated concrete using synthetic resin is examined experimentally. Transmission rates of oxygen, liquid phase water and vapor phase water through surface treatment - concrete system are measured. And fundamental concept of durability design against reinforcement corrosion is discussed.
The conclusions in this project are summarized as follows;
1. The coefficient of oxygen diffusion, which is measured using electrochemical model specimens, is ranged between 10^<-5>-10^<-6>cm^2/s in concrete.
2. Transmission abilities decrease with increasing surface treatment thickness and decreasing water cement ratio of concrete.
3. While, epoxy lining or MMA impregnation is a water proofing system, silan impregnation, silan with polymer cement mortar coating or urethane lining is a water phobic system.
4. Concrete surface treatement can't elongate the service life of chloride damaged reinforced concrete member, unless chloride contaminated cover concrete is removed.

Report

(3 results)
  • 1988 Annual Research Report   Final Research Report Summary
  • 1987 Annual Research Report
  • Research Products

    (4 results)

All Other

All Publications (4 results)

  • [Publications] 小林和夫: 土木学会論文集. 390/Vー8. 151-160 (1988)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1988 Final Research Report Summary
  • [Publications] Kobayashi, Kazuo: "Evaluation of Surface Treatment Effects for Reinforced Concrete Members Based on Durability Design Approach" Proc. of JSCE. No.402/V-10. 151-160 (1988)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1988 Final Research Report Summary
  • [Publications] 小林和夫, 宮川豊章, 久米生泰, 佐藤弘文, 喜多章行: 土木学会年次学術講演会講演概要集. 42-5. 416-417 (1987)

    • Related Report
      1987 Annual Research Report
  • [Publications] 小林和夫, 宮川豊章, 久米生泰: 土木学会論文集. No. 390/V-8. 151-160 (1988)

    • Related Report
      1987 Annual Research Report

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Published: 1987-04-01   Modified: 2016-04-21  

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